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问题描述:

[单选] 执行下列哪条命令,可以为/etc/apt/source.list文件创建备份?
A.mv /etc/apt/source.list /etc/apt/source.list.bakup B.cp /etc/apt/source.list /etc/apt/source.list C.mv /etc/apt/source.list /etc/bakup/ D.cp /etc/apt/source.list /etc/bakup/
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